edu.neu.ccs.util
Class ProbStatTools

Class ProbStatTools collects static methods that
are useful for randomization, probability, and statistics.

In 2.6.0b, added tools to compute the number of reversals in
a data list and the sign of a data list viewed as a permutation.
Also, added methods to perform random even permutations that are
similar to the earlier methods for general random permutations.
Finally, added methods to compute the next permutation of
a list in lexicographic order or the previous permuation.
These methods allow one to find all permutations of a list by
proceeding in both directions from the given list.